Kelpie,
Almost a 50% drop in share value in the last 6 months!!!
Some fairly dodgy figures you're quoting there. Qantas share price yesterday was $2.09 v $2.91 on October 25th which was the peak closing price in the last 6 months. Therefore a 28% decline.
If you compare against other international airlines, Qantas is 30% below it's 12 month peak. Cathay is 24% below, SIA is 19% below, Delta is 33% below. The common theme is oil.